Buffalo Bills defensive end and former Houston Texan Mario Williams, right, meets with Houston Texans' Antonio Smith after an NFL football game Sunday, Nov. 4, 2012, in Houston. The Texans won 21-9. (AP

Houston Texans defensive end J.J. Watt (99) waits for the against the Buffalo Bills to call a play in the fourth quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans defensive end J.J. Watt (99) waits for the against the Buffalo Bills to call a play in the fourth quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans running back Arian Foster (23) rushes for gain and Buffalo Bills cornerback Leodis McKelvin (21) pushes him out of bounds in the fourth quarter of an NFL football game Sunday, Nov. 4, 2012, in

Houston Texans running back Arian Foster (23) rushes for a gain as Buffalo Bills' Kelvin Sheppard (55) and Nigel Bradham (53) defend in the third quarter of an NFL football game Sunday, Nov. 4, 2012, in

Houston Texans outside linebacker Connor Barwin (98) encourages the crowd in the third quarter of an NFL football game against the Buffalo Bills Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans outside linebacker Connor Barwin (98) encourages the crowd in the third quarter of an NFL football game against the Buffalo Bills Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans quarterback Matt Schaub (8) hands the ball off to running back Arian Foster (23) in the first quarter of an NFL football game against the Buffalo Bills Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans quarterback Matt Schaub (8) hands the ball off to running back Arian Foster (23) in the first quarter of an NFL football game against the Buffalo Bills Sunday, Nov. 4, 2012, in Houston. (AP

Houston Texans quarterback Matt Schaub (8) calls a play against the Buffalo Bills in the third quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/Eric Gay)

Houston Texans quarterback Matt Schaub (8) calls a play against the Buffalo Bills in the third quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/Eric Gay)

Photo: Eric Gay, Associated Press

Image 14 of 17

Houston Texans defensive end Jared Crick (93) tries to block a field by Buffalo Bills kicker Rian Lindell (9) in the third quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans defensive end Jared Crick (93) tries to block a field by Buffalo Bills kicker Rian Lindell (9) in the third quarter of an NFL football game Sunday, Nov. 4, 2012, in Houston. (AP Photo/David J.

Houston Texans running back Arian Foster (23) is surrounded by his teammate after scoring on a 3-yard touchdown run against the Buffalo Bills during the third quarter at Reliant Stadium on Sunday, Nov. 4, 2012, in Houston.

Houston Texans running back Arian Foster (23) is surrounded by his teammate after scoring on a 3-yard touchdown run against the Buffalo Bills during the third quarter at Reliant Stadium on Sunday, Nov. 4, 2012,

Buffalo Bills defensive end Mario Williams (94) stares down Houston Texans tackle Duane Brown (76) across the line during the second quarter of an NFL football game at Reliant Stadium, Sunday, Nov. 4, 2012, in Houston.

Buffalo Bills defensive end Mario Williams (94) stares down Houston Texans tackle Duane Brown (76) across the line during the second quarter of an NFL football game at Reliant Stadium, Sunday, Nov. 4, 2012, in

HOUSTON — The Houston Texans are still perfect against the AFC. They get another chance this weekend to prove they can play with the best NFC teams, too.

Houston (7-1) remained unbeaten against conference opponents with a 21-9 victory over Buffalo and faces Chicago (7-1) at Soldier Field on Sunday night. In their only game against an NFC team this season, the Texans were embarrassed at home by Aaron Rodgers and the Green Bay Packers.

The Bears' opportunistic defense leads the league with 28 takeaways, but hanging onto the ball is one of the Texans' strong suits. Houston has coughed up a league-low six turnovers, none in the last two games.

“It's kind of a strength against a strength,” Houston coach Gary Kubiak said, “and hopefully we can hold up our end of the bargain.”

Chicago's defense also is generating pressure, with 25 sacks and nine in the last two games. The Texans have protected Matt Schaub all season, giving up just 10 sacks, third-fewest in the NFL.

Green Bay sacked Schaub three times Oct. 14, and Houston's offensive line looked shaky for a half coming out of the bye week, too. Schaub was sacked twice, and the Texans were called for six penalties in the first half Sunday, most of them for holding or false starts.

Most Popular

“We used our hands way too much,” Kubiak said, “just some things that you do every day and work on. We did it much better in the second half.”

Kubiak said one of his team's best traits is the ability to quickly correct mistakes in practice. And he knows the margin of error will be much smaller on the road against the Bears, who have won six in a row.

“We talk about things we didn't do good, things that if we do this in Chicago, it's going to get us beat,” he said.

The Texans' offensive game plan for Sunday seems obvious — a heavy dose of Arian Foster to neutralize Julius Peppers and the Bears' pass rush. Foster fought off an illness to rush for 111 yards against Buffalo, his fourth 100-yard game of the season.

Yards on the ground will be tough to come by against the Bears, who hadn't allowed a 100-yard rusher all season until Chris Johnson broke an 80-yard run at the end of Sunday's 51-20 rout of Tennessee. The Bears are allowing only 88 yards rushing per game, sixth in the league.